One vertex per element, one color per generator, with an edge from x to x·s.
(3,8)(6,7)(18,19)(23,25)(24,26)(31,32) involution — undirected(1,2,5,4)(3,7,8,6)(9,10)(11,14)(12,15)(13,16)(17,18,22,19)(20,23,28,25)(21,24,30,26)(27,31,29,32)(1,3)(2,6)(4,7)(5,8)(9,11)(10,12)(13,15)(14,16) involution — undirected(2,4)(6,7)(9,11)(10,14)(12,16)(13,15)(17,19,22,18)(20,25,28,23)(21,24,30,26)(27,31,29,32)(1,3)(2,7)(4,6)(5,8)(9,11)(10,14)(12,16)(13,15)(17,20,22,28)(18,23,19,25)(21,29,30,27)(24,32,26,31)(1,4,5,2)(3,7,8,6)(9,12,13,14)(10,15,16,11)(17,21,22,30)(18,24,19,26)(20,27,28,29)(23,31,25,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.